I love my flatmate and dread moving out soon

My lease will end in fewer than three months and I may move out in a month because I have found cheaper alternative accommodation. I love my flatmate. We have spent nights together for months. She gave me close emotional support in the darkest days of my life that are still plaguing me now. Our flatmate relationship has got so tense for the past two months due to a series of disagreements that we didn't talk for weeks, though she is usually smiley to me and acknowledges my presence.
I feel she doesn't like me because of those disagreements. I dread the imminent move-out as I am worried that she won't talk to me anymore and we will become strangers.
I have cried secretly three times since yesterday and it simply spoils my mood when I am travelling.
How should I cope?

How many nights have you slept with your girlfriend? If both of you have fulfilled your desires properly, then your girlfriend has become a complete woman to you, and it seems like she's searching for someone else.

Try and make up with her before you move out and stay in contact with her!

Anyone having ever had similar experience?

I am going through a similar, not exactly, experience right now. Basically we are in a house share. I am older than her. We hug often but not consumated anything further ,although I would like to. The trouble is one of other sharers is a friend of her Mother so made things awkward. I was watching a nice movie with her and then she got text warning her not to be in my room.That killed it. I am frustrated. Sorry doesnt help you but least you know you are not alone.
With yours ,I would make very best efforts ,without pressuring her, to make friends again and clear the air. Suggest you both go for meal/drink together and quietly chat, and apologise etc etc. Smooth it over now not at last minute. Thats my thoughts.

Why is that person sabotaging the relationship between you and her?

Because she really is a total B ,sorry to say but that is what it boils down to. And the person I want the relationship with is timid and she doesn't now want to go against this person. Really causes me a lot of grief but I am trapped in the house (cant vacate as need to have roof over head). etc. Anyway I do hope your's works out, and best try and speak to them and sort out. Don't leave if festering.

I see...Thank you so much for your suggestion, though I don't know if she feels positive about me and am rather scared of ruining the living environment if I make my feelings obvious. She may already know it...I am not sure

In your case I would "bite the buillet" as if you are moving out anyway. You might even ask her whether she wants to move with you to cheaper accomodation ?.

We will parting ways since she has different endeavour in her life. I will be in the house for at least a month and a half more, unless sudden changes occur...I don't know why I am scared of losing her...probably because I have lost too many friends over the past 10 years since I finished my high school long time ago...I don't know how to explain my view accurately

To be honest with you, it would be very well wprth your while finding a good Therapist now, dont waste time leaving it and working around it, and she/he could then give you insights into yourself. It might well be eye opening. If you are down South then dm me if you want details of good therapist,although there are a few around she is very good.

As someone who has been in a similar situation, the reason she is acting like this is because she knows how you feel (girls almost always know) and isn't comfortable with those feelings (at least at the moment). Your mistake, and unfortunately it is a very big mistake, and things will only deteriorate further the longer this goes on, is that you are projecting your emotions onto her (or at worst, imposing them on her) before you are even dating which most people find utterly annoying and offputting, even if they otherwise like that person. The best thing you can do now is to dial everything down massively, to stop crushing on her, to act normal around her, even to try and ignore her, and to just hope you can stay friends and meet up in the future, but if you are still crushing on her and she still isn't interested that probably wouldn't work.

I mean the reason for the disagreements and the fact that you didn't talk. I'm sorry to break it to you but she acted that way because she realised you were crushing on her and wanted to distance herself from you. That doesn't mean she doesn't like you. It just means she wasn't comfortable with you getting emotional on her. If you want my advice, stop crushing on her, try to keep things light and fun, and stop making emotional demands on her. That way you can stay friends at least and there is a chance of you getting closer at some later date.